/*
 * Copyright (c) 2007 Aleksey Nikiforov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Aleksey Nikiforov' nor the names of other contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.lex.input.effects.component;

public abstract class SpringComponent {

	public static SpringComponent getForConfig(SpringConfig config) {
		switch (SpringConfig.getConfiguredType()) {
		case SIMPLE: return new SimpleSpringComponent(config);
		case HI_REZ: return new HiRezSpringComponent(config);
		default: return new SimpleSpringComponent(config);
		}
	}
	
	
	/** current stretch distance of the spring */
	public float x;
	/** current velocity of the object attached to the spring */
	public float v;
	/** directed distance the object has traveled after the last update() */
	public float travel;
	
	public float newx;
	public float newv;
	
	protected SpringConfig config;
	
	public SpringComponent(SpringConfig config) {
		this.config = config;
	}
	
	public void stop() {
		x = 0;
		v = 0;
		travel = 0;
	}
	
	public void displace(float distance) {
		x += distance;
	}
	
	public void setDisplacement(float displacement) {
		x = displacement;
	}
	
	public float getDisplacement() {
		return x;
	}
	
	public float getTravelVector() {
		return travel;
	}
	
	public void update(float deltaT) {
		updateSpring(deltaT);
		
		if (!config.passOverAllowed && x*newx < 0) {
			v = 0;
			travel = x;
			x = 0;
		} else if (!config.bounceAllowed && v*newv < 0) {
			travel = 0;
			x = 0;
			v = 0;
		} else {
			travel = x - newx;
			x = newx;
			v = newv;
		}
	}
	
	protected abstract void updateSpring(float deltaT);
}
